MATRIXSYNTH: DIY Polyphonic Desktop Analog Synthesizer Demo

Sunday, November 01, 2026

DIY Polyphonic Desktop Analog Synthesizer Demo


video upload by Chris Synths

"Hi all! This is a (no-talking) demo of a DIY 6-voice desktop analog synthesizer I have been working on.

The hardware of each voice features two SSI 2131 VCOs, an SSI 2144 filter, a high pass filter, a wave folder, and ring mod.

All voice circuitry was made with SSI chips, op-amps, OTAs, and discrete components.

There is one effect, an 8-stage analog phaser.

There is an ST microcontroller for MIDI, voice control, display driving, front panel scanning, etc. Control voltages are produced by a DAC80501, as well as by the ST."

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